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Comparison of venturi and peristaltic vacuum in phacoemulsification
Judd M Cahoon1, Isha Gupta1, Gareth Gardiner1
1From the Department of Ophthalmology and Visual Sciences, John A. Moran Eye Center, University of Utah, Salt Lake City, Utah, USA.
Purpose:
To evaluate the efficiency of peristaltic-based and venturi-based vacuums.
Setting:
John A. Moran Eye Center Laboratories, University of Utah, Salt Lake City, Utah, USA.
Design:
Experimental study.
Methods:
Porcine lenses were hardened with formalin and cut into 2.0 mm cubes. Time to fragment removal (efficiency) and fragment bounces off the tip (chatter) were measured using a Signature machine with the ability to switch between peristaltic-based and venturi-based vacuum. Micropulse longitudinal and transversal ultrasound motions were tested.
Results:
Venturi-based vacuum had increased efficiency and decreased chatter compared with peristaltic-based vacuum at lower vacuum levels.
Conclusion:
Use of a venturi-based vacuum, when available, may result in reduced clearance time of lens material and mitigate chatter even under noisy conditions.
Financial Disclosure:
No author has a financial or proprietary interest in any material or method mentioned.
